Grav CMS Admin Tool in addition to Pihole

I want to use Grav Cms in addition to Pihole. Both applications have an admin folder if you want to use the admin tool with Grav. And this is the problem.

If I install Grav CMS in the folder “/ var / www /” with the admin folder, it overwrites the Pihole admin folder and instead of Pihole I see the Grav CMS admin login.

What can I do to make this appear separately and properly?

probably you would need to use a different sub folder like /var/www/grav/ to store your web site